Air translating apparatus



Dec. 23, 1947. H, KOCH ETAL 2,433,280

. AIR TRANSLATING APPARATUS Filed Feb. 14, 1945" v2 Sheets-Sheet 1 INVENTOR Gus'rnv H. men 8 CHRRLES 0. Essh on ATTORNEY WITNESSES: v

. Wee/4 6.14. 11%

Dec. 23, 1947 s. H. KOCH ETAL AIR TRANSLATING APPARATUS Filed Feb. 14, 1945 Z SheetS-Sheet 2 .am R F H: H TCG N o W 0 m G IH I s W F u TR Y 59 8 UH GC FIG. 4.

Patented Dec. 23, 1947 corporation, East PittSblfi'fi'h; Par, i

of Pennsylvania Our invention relates to air translating an:

paratus and, more particularly, to an electric fan "of the type which includes a "propeller and a guard disposed around and enclosing said pro= peller.

One object of the invention is to produce ah iinproved fan of the "type set forth.

The guard of an electric fan is usually made of relatively heavy gau e wire and is composed of "intersecting segments suitably secured t6seth= er at predetermined points, the guard as a Whole being secured to the casing. of the fan motor "by screws or other, separable, fastening device. It is, therefore, a, further object of our invention to produce an improved structure whereby the guard is secured to the :fan motor casing Without the use Of special fastening means whereby the connection of the guard with the ran casing is completely concealed.

A still further object of the; invention "to produce the improved striictiire described in an inexpensive manner.

These and other objects are effected 'by our invention as will be apparent from the .fonowmg description and claims taken in connection with the accofiipanying rdrawingl's, Storming a part ofithis appiieatiomin which h Fig, 1 is a side elevational View of an electric fan embodying our invention;

Fig. 2 is an enlarged, fragmentary, composite, perspective viewshowiing details of construction;

Fig. 3 'is an enlarged view partly in section and partly in rear elevation, showing details of con- S'tnuc'tion; and

Fig. 4 is a view, similar to Fig. 2, showing :a slightly modified 'form of construction.

In the accompanying drawings, there is shown an electric .fan including a supporting pedestal [0, .a motor casing 12, and a propeller 14 adapted to be driven by a shaft t6 of an electric motor [8 enclosed within the motor casing. Fhe :fan motor casing is pivoted to the pedestal H1 at 41 and is locked inadjusted position by a wingwnut It. A guard 20 protects the propeller l4. 'If desired,- the fan may be provided with :a conventional oscillating mechanism 22.

In the preferred embodiment of our (invention, we :make the fan motor casing .in :two horizontally divided sections, and we provide the guard with horizontally extending arms adapted to beclamped between the upper and lower V-motor casing sections. Also, we provide one of the casing sections with vertically disposedapertures and we provide theguard with upwardly .eiiten'ding arms adaptedt'o engage said apertures.

in Figs. '1 to 3 the motor casing is remade: persee ion -24 'afida intersect on 25 having iiixtatosed not surfaces {2 8 has so, respectively, which abut along a horizontal plane when the casing sections are assembled asshhwn in '1. The 'lip i and lower "sections are elem-pea toe ei-jhy snitable means such as rthemaesz. I M M 'Theopposrte side walls of'the lowe section are crevice-a with inwardly i)" jectihg lugs 34, the lliiiiiei" re essor which are Lfllish' the horizontal some "30 of the lower casing section. The 119* j rfac'es ti mes 3a province with l'libilzolitblllfir .Hisibsbfi elongated recess s 3'6. The fioii't portion or thltiwer 'qasin' vsectionis we: vifled with a pair ofgs tied, 'x'iertic'ally disposed openings at. .Astviill be seenrrom Fig. .3, the re: eesses" at "and theewi ge. '38 are disposed g m gitrieeny at either side or the .friotbfr Casing. Pi'friblfii, 'I' h' iies's's '38 extena -l'dflgittl'diiially, 6i earwaraiy from to rear Of the lower a section. V

"The opposite site Walls of the utter ino'tbi' casing section are provided with tinwarmy ,proiet'ititig This 111, the Jewel-faces or which are prerialbly with the lower surface 28 0f the upper motor section. The lugs 41] are adapted, iivhefi the meter casing sections are assembled,- to overlie the recesses '35. Also the ijtofit portion of the upper motor casin section 2'! is 'iirovidd with a pair or spaces, exterior dej r Ifan team 2!] may be onstruetedgm any ces'irea manner afid niay'beof any ds'iiedshaii, In order to carry out our "invention, the guard is provided with horizontally disposed .ar ins', acapteato engage the recesses as, and with siermans aisnosea adapted to engage the openings -38. Asgilllist'rated, the giiard is ,:provided with downwardly extend-ins limhs -44 terminate in rearwardly extending hori ia'drital arms 46 adanted to seat in recesses 36 and with nowaimy extending rear ar ns 4}! adapted toeng'age the irr tical openings .38. The ,entire g'iiarii, or .a t ileast the limbs 44 and 48 thereof are preferably Jar-medof wire having ta zoertain amount of resiliency With the utter casing section removed -the guard 20 j ,positioned. s0 as to enclose trielpropeller SM the upper ends ofthe vertical 1211115 48 are inserted partly upw r ly into the .vertical openins' 3'8. 'Thhorizontalarms J6 oi-the guard are then strung apart they clear thsides' of the lower casing section. The guard is then moved upwardly until the arms 46 clear the upper surface 30 of the lower casing section and are seated in the recesses 36. The vertical arms 48 now reach their uppermost position in the openings 32% .As will be seen from Fig.2, ,the side, front and rear end'walls of the recesses 36 prevent lateral and axial movement of the arms to of the guard. With the arms 46 seated in the recesses 36, the upper casing section is placed on and clamped to the lower motor casing section, as shown in Figs. 1 and 3. In this positionthe rear vertical limbs 4-! of the 'uard are seated in the recesses 42 in the front portion of the upper motor casing section.

Since the upper surfaces of the arms 42 are flush with the upper surface 38 of the lower motor casing, the arms i2 will be tightly clamped inposition by the lugs 49 of the upper lower casing section, and since the vertical arms 53 can only be withdrawn from the openings '48 by downward movement of the entire guard, it will be seen'that the guard as a whole is securely fastened in position.

In Fig. 4 there is shown a slightly modified construction which differs from the structure of Figs. 1 to 3 only in the manner in which the horizontal limbs of the guard are clamped between the upper and lower motor casing sections. In this construction, the opposite side walls of the lower casing section 26 are provided with spaced inwardly projecting ribs 50, the upper surfaces of which are flush with the upper surfaces 3!] of the lower casing section. The upper surfaces of the ribs 5E] are provided with recesses 52 for seating the spaced portions of the horizontal arms .46 of the guard. The upper casing section 24 is provided with an inwardly extending rib 55 which, when the motor casing sections are assembled, will engage the arms 46 of the guard. The upper motor casing section 24 is provided with front recesses 56 for accommodating the downwardly extending rear limbs 44 of the guard.

As shown in Fig. 4, the upper surface of the limbs 16 are flush with the upper surfaces of the ribs 58 and the upper surfaces of the lower motor casing so that they are frictionally engaged by the ribs 5A. If desired, the portions of the arms 56 suspended between the ribs 5!] may be initially bent upwardly slightly, or may be otherwise made to project slightly above the upper surfaces of the ribs 55 so that, when the motor casing sections 4 What we claim is: 1. In an electric fan including a propeller and a motor for driving said propeller, a motor casing formed of at least two separable sections, means for fastening said sections together, a guard for said propeller, an arm carried by said guard and clamped between said motor casing sections, and means for bracing said guard for preventing relative displacement thereof about said arm.

2. The structure recited in claim 1 in which said motor casing is formed of horizontallydivided upper and lower sections and in which said arm extends horizontally and is clamped between the abutting surfaces of said sections.

3. The structure recited in claim 1 in which said motor casing is formed of horizontallydivided upper and lower sections, there being a horizontally-disposed recess formed in the abutare assembled, the ribs 54 will slightly deform the arms :35, position.

The assembly of the structure shown in Fig. 4 is carried out in the same manner as that described in connection with Figs. 1 to 3.

While in the drawings we show the horizontal recesses and the vertical openings as being formed in the lower casing section, it is obvious that the recesses and openings referred to, or either of them, may be provided in the lower or in the upper motor casing section, without departing from the scope of the invention.

It will also be seen that the fan guard is secured in position without the use of screws or other extraneous separable fastening means and that the guard is secured in position by entirely concealed means.

While we have shown our invention in several forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of thus more firmly clamping them in departing from the spirit thereof.

ting surface of one of said sections. said arms being seated in said recess and clamped between said sections.

a. In an electric fan including a propeller and a motor for driving said propeller, a motor casing formed of at least two separable sections, means for fastening said sections together, a guard for said propeller, and an arm carried by said guard and extending in the plane of separation of said motor casing sections, one of said sections being provided with an opening at an angle to the plane of Separation of said sections, together with a second arm carried by said guard and disposed in alignment with and adapted to be inserted into said opening.

5, In an electric fan including a propeller, and a motor for driving said propeller, a motor casing formed of upper and lower horizontally-divided sections, means for fastening said sections together, a guard for said propeller, said guard including a pair of spaced arms extending rearwardly and horizontally therefrom and clamped between said sections, there being a pair of recesses formed in the horizontal surface of one of said sections leading rearwardly from a point near the front end of said one casing section for accommodating said arms, and means cooperating with said arms to hold said guard against displacement when said casing sections are assembled.

6. In an electric fan having a propeller and a motor for driving said propeller, a motor casing formed of horizontally-divided upper and lower sections, means for fastening said sections together, a guard for said propeller, there being horizontally-extending recesses in the horizontal abutting surface of one of said sections leading rearwardly from near the end of said one section adjacent said guard, and vertically-extending openings in a portion of one of said sections adjacent said guard, horizontally-disposed arms carried by said guard and clamped between said sections, said arms being seated in said recesses, and vertically-disposed arms also carried by said guard and engaging said openings,

'7. In an electric fan including a propeller, a motor for driving said propeller, a motor casing formed of upper and lower horizontally divided sections, means for fastening said sections together, a guard for said propeller, said guard including a pair of upwardly-extending arms and another pair of spaced arms extending rearwardly and horizontally from said guard, one of said sections having formed therein a pair of spaced vertically-disposed openings for receiving said upwardly-extending arms, there being a pair of recesses formed in the horizontal surface of one of said sections leading rearwardly from a point near the front end thereof for accommodating said other pair of spaced arms when clamped between said sections.

8. In an electric fan, a motor casing having a substantially horizontal axis and comprising lower and upper sections having complementary abutting surfaces, means for fastening said sections together, said lower section having a pair of opposite substantially axially-disposed recesses formed in the abutting surface thereof and also having a pair of upwardly-extending openings substantially normal to said recesses, and a fan guard carrying a pair of substantially vertical arms engageable in said openings, and a pair of substantially axial arms adapted to seat in said recesses, respectively, said upper section being adapted for locking engagement with said axial arms when mounted on said lower section.

9. In an electric fan, a motor casing having complementary sections with abutting surfaces, means for fastening said sections together, the first of said sections having longitudinally-disposed recesses formed in its abutting surface and leading inwardly from a point near one end thereof, and having openings extending through said portion at an angle with respect to said recesses, and a fan guard adapted to be supported by said casing, said guard having longitudinallydisposed arms adapted to seat in said recesses in clamping relation between said sections and angularly-extending arms adapted to be engaged in said openings when said casing and guard are assembled.

GUSTAV H. KOCH.

CHARLES O. EGERTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 967,971 Pollak Aug. 23, 1910 1,290,721 Dilg Jan. 7, 1919 1,064,524 Nelson et a1 June 10, 1913 1,604,178 Lawrence Oct. 26, 1926 2,022,028 Cornell, Jr Nov. 26, 1935 2,301,953 Koch Nov. 17, 1942 FOREIGN PATENTS Number Country Date 341,335 France 1904 

